下拉列表怎么做的

$scope.data=[
                {name:'后盾網(wǎng)',value:'www.baidu,com'},
                {name:'北京',value:'beijing'},
                {name:'南京',value:'nanjing'},
                {name:"天津",value:'tianjin'}

            ]
            $scope.city='beijing'
<select ng-options="v.value as v.name for v in data" ng-model='city'>
    <option value="">請(qǐng)選擇城市</option>{{v.value}}
 </select>